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[7] [8] A drug may be classified as second-line instead of first-line for one of three possible reasons: 1) it may be less effective than the first-line drugs (e.g., p-aminosalicylic acid), 2) it may have toxic side-effects (e.g., cycloserine), or 3) it may be effective, but unavailable in many developing countries (e.g., fluoroquinolones ...
Specifically it is used, along with other antituberculosis medications, to treat active multidrug-resistant tuberculosis. [2] It is no longer recommended for leprosy. [3] [2] It is taken by mouth. [2] Ethionamide has a high rate of side effects. [4] Common side effects include nausea, diarrhea, abdominal pain, and loss of appetite.
The most common side effects of bedaquiline in studies were nausea, joint and chest pain, and headache. The drug also has a black-box warning for increased risk of death and arrhythmias, as it may prolong the QT interval by blocking the hERG channel. [15] Everyone on bedaquiline should have monitoring with a baseline and repeated ECGs. [3]
Gastrointestinal side-effects (nausea, vomiting, diarrhoea) are common; the delayed-release formulation is meant to help overcome this problem. [15] It is also a cause of drug-induced hepatitis. Patients with glucose-6-phosphate dehydrogenase deficiency should avoid taking aminosalicylic acid as it causes haemolysis. [16]
The (+)-(S,S)-enantiomer harbors the antitubercular activity. This enantiomer is 500 and 12 fold more potent than (−)-(R,R)-ethambutol and the meso-form respectively. On the other hand, all the three isomers are equipotent in terms of the major side-effect of the drug, optic neuritis. [9] Toxicity is associated to both dose and duration of ...
Several of the less powerful second-line drugs, which are required to treat MDR-TB, are also more toxic, with side effects such as nausea, abdominal pain, and even psychosis. The Partners in Health team had treated patients in Peru who were sick with strains that were resistant to ten and even twelve drugs.
If these drugs are misused or mismanaged, multidrug-resistant TB (MDR-TB) can develop. MDR-TB takes longer to treat with second-line drugs (i.e., amikacin, kanamycin, or capreomycin), which are more expensive and have more side-effects. XDR-TB can develop when these second-line drugs are also misused or mismanaged and become ineffective.
Pretomanid is an antibiotic medication used for the treatment of multi-drug-resistant tuberculosis affecting the lungs. [4] [5] It is generally used together with bedaquiline and linezolid. [4] It is taken by mouth. [4] The most common side effects include nerve damage, acne, vomiting, headache, low blood sugar, diarrhea, and liver inflammation ...